Drop-door.



F. R. HENRY.

DROP DooR. 934,726, APPLMTION FILED MAR. l' 1909. Patented Sept. 21,1909.-

UNITED fsTArns PAEN FFM.

FRANK R. HENRY, 0F ST. LOUIS, MISSOURI, ASSIGNOR T0 MAJESTICMANUFACTURING.

COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION.

DROP-DOOR.

Specification of Letters Patent. Patented Sept. 21, 1909.

Application filed March 1, 1909. Serial No. 480,516.

To all whom 'it lmay concern:

Be it known that I, FRANK R. HENRY, a citizen of the United States ofAmerica, residing at the city of St. Louis, in the State of Missouri,have invented certain new and useful Improvements in Drop-Doors, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecification.

My invention relates to that description of doors commonly used uponranges and stoves and it has for its object a construction of hingewhereby the doors may be limited in their downward movements andmaintained in a horizontal position after they have been opened.

'Figure I is in part a front elevation partly broken out of my door,with one of the hinge boxes shown in vertical section. Fig. II is avertical section taken on line II-II, Fig. I. Fig. III is an enlargedvertical section taken on line III-III, Fig. I, the door being omittedand showing one of the hinge boxes in elevation. Fig. IV is an enlargedvertical section taken through the door frame and one of the hinge boxeson the line II-II, with a fragment of the door and one of its pintles ina position assumed when the door is lowered.

In the accompanying drawings :1 -designates a rectangular door framesecured 1n any suitable manner to the wall 2 having a doorway that is tobe controlled by my door. The frame is provided at its upper end with anoutwardly projecting catch arm 3, preferably containing a slot extendingdownwardly from its top surface, the catch arm being of a. form commonlyused in connection with drop doors upon stoves and ranges.

4 designates the drop door provided at its upper end with a loop 5adapted to be placed in engagement with the cate arm 3. At the lowercorners of the door are pintles 6 extending-laterally from the sides ofthe door. These pintles are of L-shape, being thicker at their lowerportions than at their upper portions, as seen in Figs. II and IV.

7 designates hinge boxes secured by suitable means, such as screws 8, tothe door frame 1. The outer sides of these hinge boxes are closed, andpockets 9 extend from the closed sides of the boxes to their innersides. At the rear of each box and at the bottom of the pocket thereinis a recess 10, and in front of said recess at the bottom of the pocket,is a horizontal ledge 11.

l2 designates stop lugs projecting from the front face of the door frame1 and which are present within the pockets 9 in the hinge boxes abovethe recesses 10 in said boxes.

When the drop door is in an upright and closed position, the thickenedlower portions of the hinge pintles 6 occupy the recesses 10 in thehinge boxes and by fitting snugly in these recesses act to hold theinner face of the drop door snugly against the door frame so that aclose joint is maintained between such parts, the stop lugs /12 beingreceived by the recesses 6a of the hinge pintles. Then when the door isto be opened, it is elevated to a sulicient degree to withdraw thepintles from the recesses 10, whereupon the door may be lowered to ahorizontal position and as it reaches such horizontal position, the rearfaces of the thickened lower portions move to horizontal positionsbeneath the stop lugs 12, while the outer faces of the upper portions ofthe pintles move into positions upon the ledges l1 of the hinge boxes.The pintles are, therefore, confined from furthervdownward movement, asillustrated in Fig. IV, due to the upper bearings therefor furnished bythe stop lugs y12 and the lower bearings furnished by the ledges 1l.

I claim The combination of a door frame having a door opening and stoplugs projecting from the face of the door frame, hinge boxes secured tothe door frame in front of the stop lugs' each hinge box being formedwith a pocket, a recess at the bottom of the pocket and a horizontalledge in front of the recess, and a drop door having pintles fitting inthe recesses of ythe hinge boxes, and formed with recesses which receivethe stop lugs. e

FRANK R. HENRY.

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